Joseph freiherr



UNITED STATES PATENT. OFFIC JOSEPH FREIHERR VON MERING, OE HALLE-ON-THE-SAALE, GERMANY.

AtIlDYL COMPOUND F PARA-OX'YPHENYLURETHAN lZTlll-IRS.

SPECIFICATION forming part of Letters Patent No. 11,489, dated June 25, 1895.

Application filed September 23, 1893. Serial No. 486,321; (Specimens) Patented in Germany November 12, 1892, No. 69,328, and in BelgiumDecember 10, 1892,110. 102,518.

To aZZ whom it may concern:

Be it known that I, JOSEPH FREIHERR. VON MERING,'a'S11bject of the German Emperor, residing at Halle-on-the-Saale, Germany, have invented a Production of Acidyl Combinatious of the Ethers of the Para-Oxypheuylurethans, (for which I have obtained Letters Patent in Germany No. 69,328, dated November 12, 189%, and in Belgium, No. 102,518, dated December 10, 1892;) and I do hereby declare the following to be a full, clear, and exact description of the invention. My invention relates to the production 0 i acidyl combinations of the ethers of theparaoxyphenylurethans, and has for its object the production of antipyretic and analgesic bodies for use as medicinal agents, to which end the invention consists in the process of obtaining said bodies and in the product. The composition of the ethers of the para-oxyphenylurethans corresponds to the chemical formula:

in which R and R represent any desired alcohol radicle. By substituting an acidy-l group (according to the presentinvention only acetyl (GOOH propionyl (OOOH OH and benzoyl (OOG H are intended to be used as acidyl) for the hydrogen atom directly com- The following example clearly describes the process of combining with acetyl.

Production of para-methoxyphenylacetylaeihyZurethan.-I heat about ten kilos paramethoxyphenylaethylurethan with a like proportion of acetic acid anhydrid, preferably under pressure, for about one hour, after which the excess of acetic acid anhydrid is distilled OE and the residue allowed to crystallize. In a bincd with the nitrogen atom of such paraoxyphenylurethans, the said product of the present invention will be obtained. The chemical formula of such product therefore runs as follows:

Rs OHORN in which R represents one of the acidyl groups, OOCH and COCH OH and COO H while R and R represent, as already stated, any desired alcohol radicle.

The mentioned ethers of the para 'oxyphenylurethans to be employed are practically obtained by the action of chlor-carbonic acid alkylether upon the para-amidophenyl others and for the purpose of combining the same +OH3COOH.

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similar manner other acetyl combinations of ethers of para-oxyphenylurethan can be obtained by substituting the desired urethan ether in lieu of those above referred to; and,

as heretofore stated, the acetic acid anhydrid may be replaced by another acetylic agent. If, onv the other hand, a propionylic or benzoylic agent is used in lieu of an acetylic agent, the corresponding propionyl or benzoyl combinations are obtained, and for this purpose propionylic or benzoylic agents corresponding to the described acetylic agents, as propionic acid, or propionic acid anhydrid, or propionylchlorid, or benzoic acid anhydrid, or benzoylchlorid may be employed, the mode of fprocedure and the proportions of ingredients being substantially the same as in the production of the acetyl combinations.

, The products obtained by the process described are characteristic bodies that crystallize readily, are not easily soluble in cold Water, but dissolve in alcohol or benzene as Well as in glacial acetic acid, and possess marked antipyretic and analgetic properties, as it has been shown that a dose of 0.05 grams will reduce a fever temperature from three to four degrees centigrade in a comparatively short time, and said products constitute therefore appropriate and valuable medicinal agents, which may be administered in doses varying from one-half to one gram, either in the form of powders or pills, or in the form of a solution.

By the described process the following combinations can be obtained:

hFirst, para-methoxyphen ylacetylaethylu er- 1. an:

COCH o,H,ocH,N

oooo,i-I,. Small white needles, melting point about to 61 centigrade.

Second, para-aethoxyphenylacetylmethylurethan:

COCH ClhOC H N cooou,. Separates out of glacial acetic acid in the form of thin blades of lamellae; melting point about 845 to 86 centigrade.

Third, para-aethoxyphen ylacetylaeth ylurethan:

COCH

oooo,i-I,. Crystallizes out of glacial acetic acid in the form of hard needles; melting point about 95 centrigrade.

Fourth, para-aethoxyphenylacetylamyl urethan COCH

111 the form of thin white leaves or blades; melting point about 47 to 48 centigrade.

Fifth, para-aethoxyphenylpropionylaethylurethan:

COCH CH (J I-I,OC l-I N 1 OOOO H In the form of white leaves; melting point about 85 to 86 centigrade.

Sixth, para-methoxyphenylbenzoylpropylureth an: I

GOG I'I C H OCH COOC l-I Grystallizes out of benzene in the form of white needles; melting point about 78 to 80 vCentigrade.

Seventh, para-butoxyphenylbenzoylamylurethan: I

COG H C l-T 00 11 9\ COOC H 000R, in which R and R represent any desired alcohol radicle, and R represents one of the described acidyl groups, acetyl, propionyl or benzoyl, such products being readily crystallizable, and more or less soluble in alcohol and benzene, and possessing antipyretic and analgesic properties.

2. The herein-described process of obtain ing acidyl combinations of the ethers of paraoxyphenylurethans, which process consists in substituting an acidyl group for the hydrogen atom directly combined with the nitrogen atom of the ethers of the parabxyphenylurethans, by heating said ethers with reagents containing the acidyl group as acetic acid anhydrid.

JOSEPH FREIIIERR VON MERING.

Witnesses:

E. BAUMANN, M. FUXIUs.

ICC 

